John-  h



l. H. GRUBE.

me UNER.

APPLCATION FILED DULZB. |917* RENEWED IUNE 4| 19H]A Patented July 1919.

m. TJ m V N 1/m if Grube sirenes PATENT OFFICE,

JOH HJ GUZBE; F LOS ANGELES, CALIFORNIA, ABSIGNOB T0 AIRBAFE INNER TIREJGQMPANY, 0F LOS ANGLES, CALIFORNIA, CORPORATION OF NEVADA.

TIRE-LINER.

mammelle.A

Specification et Letters Patent.,

Patented July 8, 1919.

A1111liillf ltl9liA tiled December 28, 1917, Serial 11m-209,981. RenewedJune 4. 1918. y Serial No. 301,810.

To all whomz'tmaiy concern."

Be it lriiwntbat I, JOHN H. Gimn a citizeli'bfltlienited VStatesresiding at os Angeles;initlie'coiiiityv of os IAngeles and State ofCalifornia, have invented a new and useful Tire-Liner, of which thefollowing is a s iecifidait'in; i Q

hisfjn nti'n relates to a tire liner adaptilto bint'eposcd between theouter casing'aiidi 'er tube of a' pneumatic tire and particularlypertains to improvements in theinner Vlinerset forth in United StatesPatent Number 1,217,754, issued to me February' 27, 1917, and also in mycopending application filed August 7, 1916, #1135805. Innerliners forpneumatic tires heretofore designed` have met with little commercialsuccess and have not come into general use primarily because of thetendency of the liner to pinch the inflatable tube incasedthereingth'u's 'injiiring the tube it is designed to protect. Thispinching of the tube is usually caused bythe edges formed by thedivsiohext'ending Ycircumferentially of the innerperipheryof the liner,the edges overlapping and tforming a joint which in Working of the tirebites into the inner tube and i an innerftire *w eventuali causing thelatter to leak or blow olit. Th s pinching isaugumeiited by lack ofproperlresiliency and elasticity in the liner andL iftslflap portions.

It is V"the obect fthis invention to provide l biii constructed so astoobviate ythe above dilliulty and at the same time aordproteotion `to theinner tube agai-nstipuncture-and blow outsdue `to `penetrationionseverance of the outer easing.

A #funtlieii Objectis to tire having :universal clactloity toencompassing same. i i i Othen flibiieetscwill y appear hereinafter.

The innmtion is Fillnstra'ted fin the aecom+ panyingfdrawingsyinfwhicli:1 'A i Fig. 2l i'sia perslpectvewiew of same as se'eu in section;andieevation. i

Fig. a.- is `antifa-,8.1.1 illustrating jan. @han 1 rovide an innerl p Iv permit-it,y on miiation.;` lrturcdniiorrn' tojan outer casingY oordemployed in reinforcing the Walls of the liner.

In carrying out the present embodiment of my invention, I employ aspecially constructed mold as disclosed in a copending application filedcoincident herew1th, and in building up a liner I first form an elasticannular flap 5 of tapered cross section. This fia is com osed of'aseries of layers of sheet ru ber, in cated at a, b, c, d, e, f, g, h.,1', which layers are of decreasing widths from a. to 1'. and arearranged in the order of their decreasing Widths with the Widest layer ainnermost and with the opposite edges of the layer offset in relation tothe edges of the adjacent layer. The outer face of the flap is thusformed with a bevel and tapers to a feathered or Wafer outer edge. Toreinforce the feathered or wafer edge, a narrow strip of fabric 6preferably formed of elastic cord, is embedded in the flap, beinginterposed between the outer portions of the sheets or la 'ers a and l).The inner portions of the layers are turned on an are and their edgesterminate in offset relation to each other.

Overlapping the inner face of the inside layer a isa thin strip j ofsheet rubber having graphite incorporated therein to render it smoothand non-adhesive, and which "strip is turned over the core of the moldto form the transversely arched inner face of the liner, the strip jextending substantially throughout Athe inner face of the liner. Theliner 1s in the form of an annular tube of .substantially circular crosssection and divided circulnferentiaflly on its inner periplv i ery toprovide separable side members with ,the flap'projecting inwar y fromone side Amember to overlap the o't side member on the inner sidethereof.

In formingltli'e bodyif the liner, several F layers of fabric 7 and #arearranged exteriorlyvof the stri j and extend over the arch Jportion ofthe ric strips-terminating in spaced relation to i `the edges of theinner strip j and with one mer-'fand part way aong'the l `yside portionsthereofythe edges of these fab` edge joining the edges ofthe layers aand b.

(ill

A series of sheets of rubber 9 are laid over (he l'nhrie .strips 7 and8, and overlap the edges lhcreof, these sheets joining the oli'sot endsof the layers c, d, e and f' on one side of the liner and converginginto :i filler strip l() on the strip j on the other side. An elasticbody ll is thus formed in'continuation of the edges of the fabric stripsand extendin thereover.

he tread portion of the liner is formed by a series of' layers 12 ofrubber, which ex tend over thecentral portion of the layers ll and jointhe upper edges of fabric reinforging strips 13 and 14 planted on theouter` portions of the elastic strips 9. These fabric strips reinforcethe side walls of the liner and nrc arranged near the outer surfacethereof with their outer edges overlapping the edges of' the innerfabric strips 7 and 8 in spaced relation thereto. The space be tween theoverlapping fabrics is filled by the elastic sheets 9, which forms anelastic body between the l'nbric on the crown :1nd the overlap oi thefabric on the side portions of the liner. This is important, in thatwhen the liner is plnced in an outer casing und un inner lube isinflated therein the liner win expand to conform to the outer ensing.:ind also permits the separate fabrics to wort: relative to nach otheron kneadingz the lire sind affords desired elasticity und flexibilitythroughout the tire :ind liner.

The outer surface of the liner is fornied by o, rubber sheet 7.2 whichextends over the fabric strips 13 and 14 and over the sheets 12. Oneedge of the sheet le. overlaps the -layer e' and its other edge joinsthe inside sheet j nt the inner edge of the opposite v, all of the linerwhich wall converges to n water edge 1.5. This edge 15 is designed tooverlnp the flap 5, shown in Fig. 2 and when so disposed is sliaped toencompass an inflatable inner tube and to be inserted YIn the ordinarypneumatic tire casing.

The various parts described are joined into an integral body bpvulcanizing, thus forming a resilient tubu ar annulus divided on itsinner periphery and fitted with en elastic flap in continuation of oneedge thereof. Y

To obtain the" desired elasticity, the fabric preferably employed isthat commonly termed cord which is formed of diagonal strandsimpregnated and joined by u rubber ronirwsition, Whitn permits expansionof the fzilnic in :ill directions.

ln thc application of tlir` liner. un in llnldl'dv nner tubo in plmcdtherein with tlv.' li:ip1"scli -;posn(l llctvfri'n tln tubo :Ind the opAinviti'. :lilr of ihn liinl'. 'lilnl liwr is thon pressed ti htlyagainst the inner wall of the casing an( then serves ne a protection tothe inner tube against puncture and .blow ont, the walls of the linerbeing of such thickness that ordinary causes of punctnrcs will notpenetrate w the inner tube, and is of such strength that Jortions of anouter casin g may be remove to expose the inner liner Without dan er ofblow out. This renders the inner iner articularly serviceable Where thecasing 1s subjected to unusual Wear.

By providing the liner with the flap con structed as here shown anddescribed, dan ger of pinching the inner tube is obviated, as the flapWill. readily stretch and conform to its )Osltion between the liner andinner tube Wit out pinclhing.

I claim:

1A An inner liner for anto tires comprisv ing an ex ansible annulusoiltubular fornuition divi ed on ils inner periphery. omI edge of thedivided portion formed with n. llnp of tapered cross Sectionconvoi-gin;r to :1 wafer edge and adapted to overlap th.A :mijn Centedge 0l the liner. snirl flap iiirinwl ol' resilient material, und anoxpnnsihlr ronzforeing fabric embedded in said flap.

2. In a tire liner. un oxpansiblc n'nnulue of tubular formation dividedon its` inner periphery an elastic flap formed in coul innu tion of oneof the sides thereof mlnpird lo overlap the other side intrriorlythcrnol'. said flap having a Wafer edge. a l'ubrir ruin forcement in theedge of the flap; :i lnbrir reinforcement extending` transversely ori-rthe arched portion of the nnnnlus :ind parl way on the sides, and fabricreinl'owingij strips in the side WallsI overlapping' the edges of thearched reinfori-cumul :nui spaced therefrom.

3. In a tire liner, un cxpsinsilile :umido:-` of tubular formationdivided on itsl inurl' periphery an elastic flslp forxnml in ront inno Ytion of one of the sides thereof adapted to overlap the other sideinteriorly thereof. said flap havi g a wafer edge, a fabricreinforcement in he edge of the Hap; an elastic fabric reinforcementextending transverse] v over the arched portion of the nnnulns und parl:Way on the sidels, and el-.ietic fabric reinforcing strips in the sidewalls oven lapping the edges of the arched reinforcement and spacedtherefrom.

yl. n n. tire liner, nn expnnsilrlo :innulue ol.' tnilmlnr formationdivided on ileinner periphery. nn elnnlic (lop formed in continnntiono'l' ono ol" the Sides thereof udn pl ci l to overlap the other sideintoriorly" tlnircol', scid llnp having :i viztfcr odge, :t fabricreinlorrcnwnt extending transversely over lille nrrlnd portion ol` thennnnlns and part way on tho sides. und 'lnlu'iv reinforcing: strips inthe side walls overlapping the edges of Sil lil

the arched reinforcement and spaced therefrom.

5. In :L tm lim-r. am nxpnnshlu :mnuus nl' tubular formubml divided onltr-.1 1111101' pvriplry, :m ehwic Hup formed in con-- iumltiml ffl' um:rif Hm SM05 tlwruof adapted 1U rwm'lap t'zh mihm fsirl nfurm'ly thereof,Suid Hup having :L vmful' mlgv, :m Plastic fabric. reinfqrcementextending transversoly over the arched portion of the, annulus andlopart 'way nn tha Sides, und elastic fabric ruin- {mcingstr'ps in thesida walls ovcrluppingl the edges of the arched rcini'mceumnt; undspm'ed therefrom.

J (H-IN H. GRUBF.

